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ASTM D1981-11(2015)

Historical Reaffirmation

Standard Test Method for Measuring Color After Heating of Tall Oil Fatty Acids

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1.1 This test method covers the measurement of the Gardner color of tall oil fatty acids after heating in an atmosphere of nitrogen at 205°C for one or two hours, depending on whether its iodine value is over or under 15, respectively. The specimen may be heated using either an aluminum heating block or an oil bath. This method is applicable to all tall oil fatty acids. Applicability of this method to other types of fatty acids has not been determined.

1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


3.1 The color of a tall oil fatty acid is readily affected by heat and oxidization. Variations in degree of heat, time of heat, and exposure to atmosphere during heating have a marked effect on the color obtained; therefore, conformity to the equipment and procedure outlined in this test method is essential to accuracy and precision.

SDO ASTM: ASTM International
Document Number D1981
Publication Date Dec. 1, 2015
Language en - English
Page Count 4
Revision Level 11(2015)
Supercedes
Committee D01.34
Publish Date Document Id Type View
June 1, 2011 D1981-11 Revision
Dec. 10, 2002 D1981-02 Revision
Sept. 1, 2020 D1981-11R20E01 Reaffirmation
Dec. 1, 2015 D1981-11R15 Reaffirmation
Nov. 1, 2006 D1981-02R06 Reaffirmation
Jan. 1, 1995 D1981-86R95E01 Reaffirmation